Grease cartridge



FIG. 1 is a top plan view of the grease cartridge;

FIG. 2 is a view though section line 2—2 of the top portion of the cartridge;

FIG. 3 is an enlarged partial sectional view along section line 2—2; and,

FIG. 4 is an enlarged partial view of the top of the grease cartridge. 

We claim the ornamental design for the grease cartridge, as shown and described. 